Angular 18 introduces a range of new features and enhancements aimed at improving performance, developer experience, and scalability. Here are some of the key updates:

1. Experimental support for zoneless change detection: Angular has been working towards a way of using Angular that doesn’t rely on zone.js, and they've released the first experimental APIs for zoneless. This opens many doors for developers, including improving composability for micro-frontends and interoperability with other frameworks, faster initial render and runtime, smaller bundle size and faster page loads, more readable stack traces, and simpler debugging.

2. Angular.dev: This is now the new home for Angular developers.

3. Material 3, deferrable views, built-in control flow: These are now stable and incorporate a series of improvements.

4. Server-side rendering improvements: These include i18n hydration support, better debugging, hydration support in Angular Material, and event replay powered by the same library as Google Search.

5. TypeScript 5.4 support.

6. Defer views (lazy loading of dependencies): This has moved from developer preview to stable stage.

7. Route redirects with functions: This provides more flexibility and opens up new possibilities in routing management.

8. Improved Server-Side Rendering (SSR), differential loading, the Ivy rendering engine, the Forms module, and the Angular CLI.

For more details, you can check out the sources listed below.

Sources:​

• Minko Gechev, Angular v18 is now available!
• Exploring Angular 18: A Deep Dive into New Features and Comparisons with Previous Versions
• Angular CHANGELOG
• Angular Documentation